CVE-2025-27155 In-memory stored Cross-site scripting (XSS) vulnerability in pineconesim
An attacker can inject malicious scripts into the Pinecone simulator interface, potentially executing code in the victim's browser context.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-27155?
CVE-2025-27155 is a medium-severity cross-site scripting vulnerability in matrix-org pinecone, published on 4 Mar 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Pinecone is an experimental overlay routing protocol suite which is the foundation of the current P2P Matrix demos. The Pinecone Simulator (pineconesim) included in Pinecone up to commit ea4c337 is vulnerable to stored cross-site scripting. The payload storage is not permanent and will be wiped when restarting pineconesim.
Which versions are affected by CVE-2025-27155?
3 open source packages ship an affected version, including github.com/matrix-org/pinecone.
| Package | Affected | Fixed in |
|---|---|---|
github.com/matrix-org/pinecone Go | All versions | None |
github.com/matrix-org/pinecone Go | All versions to 0.11.0 | None |
github.com/matrix-org/pinecone Go | All versions to 0.11.0 | None |
How do I fix CVE-2025-27155?
Apply the vendor's patch.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-27155 being exploited?
There is no known exploitation of CVE-2025-27155 in the wild and no public exploit code.
Sources
Also known as GHSA-fr62-mg2q-7wqv, GO-2025-3500.